MagBackdoor — Magnetic Field Voice Injection via Loudspeaker: Detection & Countermeasures

Scene 95 — MagBackdoor (Liu et al. IEEE S&P 2023): how modulated magnetic fields force a device's loudspeaker to produce injected voice commands, triggering Siri/Alexa/Google without software access. 95% injection rate across 25 devices. Detection via Hall-effect sensor and speaker monitoring. Mu-metal shielding countermeasure.

Scene 95 of 109 in the StopBeingParanoid interactive 3D research collection. Requires JavaScript and WebGL2 for the interactive visualisation.

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